Homework Answers
Reaction #1 : Forward and reverse reaction both are equally
likely i.e. .
Reaction #2 : Energy is required to carry out the conversion
i.e. .
Reaction #3 : Energy is produced in the conversion i.e.
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1. You are considering the following biological reactions that are catalyzed by specific enzymes as shown below. In...
7. Biological redox reactions are catalyzed by enzymes requiring stoichiometric co-factors. In th...
7. Biological redox reactions are catalyzed by enzymes requiring stoichiometric co-factors. In the case of the oxidation shown below, the cofactor is derived from the vitamin riboflavin. Draw a mechanism for the reaction shown in the scheme. enzyme O FAD FADH2 enzyme succinate dehydrogenase
7. Biological redox reactions are catalyzed by enzymes requiring stoichiometric co-factors. In the case of the oxidation shown below, the cofactor is derived from the vitamin riboflavin. Draw a mechanism for the reaction shown in the...
9. Which of the following statements about enzyme catalyzed reactions is NOT true? a. Enzymes form...
9. Which of the following statements about enzyme catalyzed reactions is NOT true? a. Enzymes form complexes with their substrates b. Enzymes lower the activation energy for chemical reactions c. Enzymes change the Key for chemical reactions d. Many enzymes change shapes slightly when substrate binds 10. To overcome an energy barrier between reactants and products, energy must be provided to get the reaction started. This energy, which is recovered as the reaction proceeds, is called: a. Activation energy b....
Part A - Overview of enzyme structure and enzymatic reactions Enzymes are large globular proteins. Much...
Part A - Overview of enzyme structure and enzymatic reactions Enzymes are large globular proteins. Much of their three dimensional shape is the result of interactions between the R (variable) groups of their amino acids. The active site is the portion of the enzyme that will interact with the substrate the molecule that the enzyme acts upon. The nature and arrangement of amino acids in the active site make each enzyme specific to a substrate and to the reaction it...
2. Enzymes are important biological molecules and they act as catalysts for specific chemical reactions. Their...
2. Enzymes are important biological molecules and they act as catalysts for specific chemical reactions. Their biological function is determined by their 3 dimensional shape and the functional groups present in the active site. (a) What are the main mechanisms by which an enzyme increase the rate of a reaction? (b) What is a cofactor in an enzyme mediated reaction? (c) Give the name of a cofactor (structure if possible) and indicate the type of reaction that it facilitates. 3....
4. Which of the following enzymes catalyzed reactions in glycolysis require(s) ATP as a substrate? A)...
4. Which of the following enzymes catalyzed reactions in glycolysis require(s) ATP as a substrate? A) Phosphoglycerate mutase E) Pyruvate kinase B) Aldolase F) Phosphofructokinase-1 C) Phosphoglycerate kinase G) Hexokinase D) Glyceraldehyde-3-phosphate dehydrogenase 5. Blood Lactate Levels during Vigorous Exercise The following graph shows the concentrations of lactate in blood plasma before, during, and after a 400 m sprint. Use your knowledge from chapter 14 to explain the causes of the rapid rise in lactate concentration? --Before-- - After Blood...
The following occur in enzyme-catalyzed reactions except A. The substrate is transformed at the active site...
The following occur in enzyme-catalyzed reactions except A. The substrate is transformed at the active site B. The enzyme does not undergo any change change C. Enzyme-substrate complex is formed O D. Activation energy of the reaction is increased O E. Activation energy is lowered QUESTION 34 bonds In the alpha helical structure of the DNA, the base G pairs with the base c by A. 3 hydrogen B. 3 covalent C. 2 covalent D.3 amide E. 2 hydrogen
1. Write the category names of the following enzymes: hexokinase (EC 2.7.1.1) _; ATPases (EC 3.6.1.3)...
1. Write the category names of the following enzymes: hexokinase (EC 2.7.1.1) _; ATPases (EC 3.6.1.3) Fructose-bisphosphate aldolase (EC 4.1.2.13) ; ATP synthase (EC 7.1.2.2). phosphoglycerate mutase 1 (EC 5.4.2.11) ;DNA ligase (EC 6.5.1.1). Glyceraldehyde 3-phosphate dehydrogenase (EC 1.2.1.12) 2. True or False Enzymes are general chemical catalysts and each enzyme can recognize many different substrates in cells. Enzymes change the equilibrium constants for the reactions they catalyze. Enzymes lower the activation energy for the reactions they catalyze. Enzymes do...
First question: Which type of enzyme fron table 11-2 catalyzes the following reactions (a) 600 c=0...
First question: Which type of enzyme fron table 11-2 catalyzes the
following reactions
(a) 600 c=0 CH + NADH + H - 500- + NAD HO-- CH, COO H-CH(CH HỘI NH ADP + P 5. On the free energy diagram shown, label the intermediate(s) and transition state(s). Is the reaction thermodynamically favorable? 6. Urcase, the first enzyme to be crystallized, is inhibited in the presence of Hg, Cd, or Co ions What does this information suggest about the catalytic mechanism...
2. Consider the reactions 1 and 2 shown below. Indicate how the reaction rate for each of the reactions will change...
2. Consider the reactions 1 and 2 shown below. Indicate how the reaction rate for each of the reactions will change your options are: increase, decrease, does NOT change) when the following modifications to the reactions and conditions are introduced: reaction 1 reaction 2 Br CH30 Na CH3OH CH OH as solvent CH3OH is also solvent A. The reaction temperature for both reactions is increased. B. The concentration of the reagent shown above the arrow is increased. C. The concentration...
Thinking Through the Concepts Multiple Choice 1. Which of the following is True? a. Enzymes increase...
Thinking Through the Concepts Multiple Choice 1. Which of the following is True? a. Enzymes increase activation energy requirements. b. Activation energy is required to initiate exergonic reactions. Heat cannot supply activation energy. c. d. Stomach acid inactivates pepsin. 2. Which is not an example of an exergonic reaction? a. photosynthesis b. a nuclear reaction in the sun c. ATP → ADP + Pi d. glucose breakdown .3, which of the following is True? a. ATP is a long-term energy...
7. Biological redox reactions are catalyzed by enzymes requiring stoichiometric co-factors. In the case of the oxidation shown below, the cofactor is derived from the vitamin riboflavin. Draw a mechanism for the reaction shown in the scheme. enzyme O FAD FADH2 enzyme succinate dehydrogenase
7. Biological redox reactions are catalyzed by enzymes requiring stoichiometric co-factors. In the case of the oxidation shown below, the cofactor is derived from the vitamin riboflavin. Draw a mechanism for the reaction shown in the...
9. Which of the following statements about enzyme catalyzed reactions is NOT true? a. Enzymes form complexes with their substrates b. Enzymes lower the activation energy for chemical reactions c. Enzymes change the Key for chemical reactions d. Many enzymes change shapes slightly when substrate binds 10. To overcome an energy barrier between reactants and products, energy must be provided to get the reaction started. This energy, which is recovered as the reaction proceeds, is called: a. Activation energy b....
Part A - Overview of enzyme structure and enzymatic reactions Enzymes are large globular proteins. Much of their three dimensional shape is the result of interactions between the R (variable) groups of their amino acids. The active site is the portion of the enzyme that will interact with the substrate the molecule that the enzyme acts upon. The nature and arrangement of amino acids in the active site make each enzyme specific to a substrate and to the reaction it...
2. Enzymes are important biological molecules and they act as catalysts for specific chemical reactions. Their biological function is determined by their 3 dimensional shape and the functional groups present in the active site. (a) What are the main mechanisms by which an enzyme increase the rate of a reaction? (b) What is a cofactor in an enzyme mediated reaction? (c) Give the name of a cofactor (structure if possible) and indicate the type of reaction that it facilitates. 3....
4. Which of the following enzymes catalyzed reactions in glycolysis require(s) ATP as a substrate? A) Phosphoglycerate mutase E) Pyruvate kinase B) Aldolase F) Phosphofructokinase-1 C) Phosphoglycerate kinase G) Hexokinase D) Glyceraldehyde-3-phosphate dehydrogenase 5. Blood Lactate Levels during Vigorous Exercise The following graph shows the concentrations of lactate in blood plasma before, during, and after a 400 m sprint. Use your knowledge from chapter 14 to explain the causes of the rapid rise in lactate concentration? --Before-- - After Blood...
The following occur in enzyme-catalyzed reactions except A. The substrate is transformed at the active site B. The enzyme does not undergo any change change C. Enzyme-substrate complex is formed O D. Activation energy of the reaction is increased O E. Activation energy is lowered QUESTION 34 bonds In the alpha helical structure of the DNA, the base G pairs with the base c by A. 3 hydrogen B. 3 covalent C. 2 covalent D.3 amide E. 2 hydrogen
1. Write the category names of the following enzymes: hexokinase (EC 2.7.1.1) _; ATPases (EC 3.6.1.3) Fructose-bisphosphate aldolase (EC 4.1.2.13) ; ATP synthase (EC 7.1.2.2). phosphoglycerate mutase 1 (EC 5.4.2.11) ;DNA ligase (EC 6.5.1.1). Glyceraldehyde 3-phosphate dehydrogenase (EC 1.2.1.12) 2. True or False Enzymes are general chemical catalysts and each enzyme can recognize many different substrates in cells. Enzymes change the equilibrium constants for the reactions they catalyze. Enzymes lower the activation energy for the reactions they catalyze. Enzymes do...
First question: Which type of enzyme fron table 11-2 catalyzes the
following reactions
(a) 600 c=0 CH + NADH + H - 500- + NAD HO-- CH, COO H-CH(CH HỘI NH ADP + P 5. On the free energy diagram shown, label the intermediate(s) and transition state(s). Is the reaction thermodynamically favorable? 6. Urcase, the first enzyme to be crystallized, is inhibited in the presence of Hg, Cd, or Co ions What does this information suggest about the catalytic mechanism...
2. Consider the reactions 1 and 2 shown below. Indicate how the reaction rate for each of the reactions will change your options are: increase, decrease, does NOT change) when the following modifications to the reactions and conditions are introduced: reaction 1 reaction 2 Br CH30 Na CH3OH CH OH as solvent CH3OH is also solvent A. The reaction temperature for both reactions is increased. B. The concentration of the reagent shown above the arrow is increased. C. The concentration...
Thinking Through the Concepts Multiple Choice 1. Which of the following is True? a. Enzymes increase activation energy requirements. b. Activation energy is required to initiate exergonic reactions. Heat cannot supply activation energy. c. d. Stomach acid inactivates pepsin. 2. Which is not an example of an exergonic reaction? a. photosynthesis b. a nuclear reaction in the sun c. ATP → ADP + Pi d. glucose breakdown .3, which of the following is True? a. ATP is a long-term energy...
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